Citrus reticulata Blanco plant named ‘Tamnaneunbong’

ABSTRACT

A new and distinct  Citrus reticulate  Blanco plant named Tamnaneunbong, characterized by its upright plant type and strong vigor, short oval ovary shape, germination state in middle of April, blooming state in late May, fruits start coloring in late October, mature state in late March, acidity of the fruit juice at about 1.51%, leaf length at about 10.1 cm and leaf width at about 4.3 cm, and length of leaf petiole at about 3.6 cm.

Latin name of the genus and species of the plant claimed: Citrus reticulata Blanco.

Variety denomination: ‘Tamnaneunbong’.

BACKGROUND OF THE INVENTION

The new and distinct cultivar is a product of a breeding program by the inventors. This cultivar was developed by embryo sac culture. The embryo sac culture of ‘Shiranui’ (not patented) was carried out in 2000. The characteristic investigation of these nucellar seedlings was done from 2007 to 2010 in a greenhouse. The first screening was carried out in 2007, and the last screening was carried out in 2010. One new variety was picked and named ‘Tamnaneunbong’.

The somatic cells of the nucellar tissue can also develop into embryos, called nucellar embryos, and then germinated into a plurality of nucellar seedings. The candidate varity is developed from the nucellar embryos of the femle parent. The variety was asexually propagated by grafting onto ‘Satsuma’ rootstock (or trifoliate orange rootstock) in Jeju-do, Korea for three generations and there was no genetic variation. The observed plant retains its distinctive characteristics and reproduces true to type in successive generations. Therefore, its traits are stable. The rootstock of ‘Satsuma’ is the tangerine tree and tangerine has no patent status.

The fruit characteristics of ‘Tamnaneunbong’ are in the table below. The test carried out from 2007 to 2010. ‘Shiranui’ was 5 years old in 2007. The ‘Tamnaneunbong’ was the nucellar seedling in this table.

TABLE 1 Fruit Characteristics Survey Fruit Peak date Fruit Flesh shape height (yy.mm.dd) Variety weight (g) rate (%) index ( mm) 07.1.24 Tamnaneunbong 268.4 77.5 94 15.6 Shiranui 315.2 69.4 100 13.8 08.2.14 Tamnaneunbong 254.8 75.7 89 12.8 Shiranui 172.4 72.4 98 4.5 09.2.17 Tamnaneunbong 364.8 72.6 93 17.0 Shiranui 322.4 75.6 92 15.1 10.2.24 Tamnaneunbong 240.3 — — — Shiranui 157.0 — — — Survey Thickness Seed Acid- Sugar date of the skin grain Sugar ity acid (yy.mm.dd) Variety ( mm) number (°Bx) (%) ratio 7.1.24 Tamnaneun- 2.9 0 14.4 1.28 11.24 bong Shiranui 5.3 0 12.4 1.14 10.92 8.2.14 Tamnaneun- 3.7 0 13.6 1.44 9.43 bong Shiranui 4.3 0 12.8 1.32 9.71 9.2.17 Tamnaneun- 4.2 0 15.3 1.28 11.97 bong Shiranui 4.1 0 13.7 1.14 11.98 10.2.24 Tamnaneun- — 0 15.3 1.46 10.47 bong Shiranui — 0 12.2 1.46 8.35 Fruit shape index = The transverse diameter ÷ The longitudinal diameter × 100

Additional fruit characteristics of ‘Tamnaneunbong’ are in the table below. ‘Shiranui’ was 8 years old in 2010. The ‘Tamnaneunbong’ was grafted onto five years old ‘Shiranui’ three years ago.

TABLE 2 Additional Fruit Characteristics Survey Fruit Flesh Fruit Peak date weight rate shape height (yy.mm.dd) Variety (g) (%) index (mm) 10.1.27 Tamnaneunbong 280.9 77.7 95 10.7 Shiranui 255.6 77.0 97 9.2 10.3.4 Tamnaneunbong 237.7 76.5 93 — Shiranui 258.8 73.0 93 — Survey Thickness Seed Sugar date of the grain Sugar Acidity acid (yy.mm.dd) Variety skin (mm) number (°Bx) (%) ratio 10.1.27 Tamnaneun- 3.6 0 15.3 1.45 10.67 bong Shiranui 3.8 0 14.5 1.20 12.08 10.3.4 Tamnaneun- 3.8 0 17.5 1.51 11.74 bong Shiranui 4.1 0 16.0 1.22 13.17

SUMMARY OF THE INVENTION

The cultivar ‘Tamnaneunbong’ has not been observed under every possible environmental conditions. Therefore, there may be variations in the phenotype due to varying environmental conditions such as temperature, day length and light intensity. However, the genotype will not vary.

The following traits have been repeatedly observed and are determined to be the characteristics of the new cultivar of Citrus reticulata Blanco. These attributes in combination distinguish ‘Tamnaneunbong’ from and all other varieties of Citrus reticulata Blanco known to Inventors.

-   -   1. The plant type of ‘Tamnaneunbong’ is upright and the tree         vigor is strong.     -   2. Ovary shape of ‘Tamnaneunbong’ is short oval.     -   3. The fruit color is orange.     -   4. Germination stage is in the middle of April.     -   5. Blooming stage is in late May.     -   6. Fruits start coloring in late October.     -   7. The mature stage is in late March.     -   8. Acidity of the fruit juice is about 1.51%.     -   9. The leaf length is about 10.1 cm and the leaf width is about         4.3 cm.     -   10. The length of leaf petiole is about 3.6 cm.

Plants of the new cultivar ‘Tamnaneunbong’ are similar to plants of the seed parent ‘Shiranui’ in most horticultural characteristics, however, the plants of the new cultivar ‘Tamnaneunbong’ produce fruit that are more acidic than the parent. The fruit produced by ‘Tamnaeunbong’ start coloring in late October and mature in late March.

The new cultivar differs from the closest comparable plants as shown in the tables below:

TABLE 3 Comparison With Closest Variety Denomination Characteristic in of similar which the similar The expression of the characteristic variety variety is different Similar variety Candidate variety Shiranui Plant: type medium upright Plant: tree vigor medium strong Ovary: shape depressed globose short oval Fruit juice: acidity 1.22% 1.51% Leaf: leaf length 8.0 cm 10.1 cm Leaf: leaf width 3.0 cm 4.3 cm Leaf petiole: length 4.1 mm 3.6 mm Fruits start coloring in early October in late October Mature stage in early March in late March

TABLE 4 Comparison With Closest Variety Forms of Expression NO Characteristics 1 2 3 4 5 1 Plant: Type upright medium 2 Young shoot: thin medium thickness 3 Young shoot: very short medium length short 4 Stem: internode very short medium length short 5 leaf: color light green green 6 leaf: length very short medium short 7 leaf: width very narrow medium narrow 8 leaf: length/ small medium width ratio 9 leaf: thickness thin medium 10 Leaf petiole: very short medium length short 11 Leaf petiole: thin medium thickness 12 Flower: petal very short medium length short 13 Flower: petal very narrow medium width narrow 14 Ovary: shape Long globose depressed ap- cylinder oval globose planate 15 Flower: activity absent pollen 16 Fruit: length/ small medium width ratio 17 Fruit: surface green yellowish light medium yellowish color green yellow yellow orange 18 Fruit: surface smooth roughness 19 Fruit: fresh with light light medium light color white green yellow yellow orange 20 Fruit: skin thin medium thickness 21 Fruit juice: low medium total soluble solids 22 Fruit juice: low medium acidity 23 Mature stage very early medium early 24 Parthenocarpy absent 25 Self-in- absent compatibility 26 Tree vigor weak medium Forms of Expression NO Characteristics 6 7 8 9 1 Plant: Type pendulous 2 Young shoot: thick thickness 3 Young shoot: length long very long 4 Stem: internode long very long length 5 leaf: color dark green 6 leaf: length long very long 7 leaf: width broad very broad 8 leaf: length/width large ratio 9 leaf: thickness thick 10 Leaf petiole: length long very long 11 Leaf petiole: thick thickness 12 Flower: petal length long very long 13 Flower: petal width broad very broad 14 Ovary: shape short oval gourd 15 Flower: activity present pollen 16 Fruit: length/width large ratio 17 Fruit: surface color medium dark red with red orange orange orange 18 Fruit: surface rough roughness 19 Fruit: fresh color medium dark red purple orange orange 20 Fruit: skin thickness thick 21 Fruit juice: total high soluble solids 22 Fruit juice: acidity high 23 Mature stage late very late 24 Parthenocarpy present 25 Self-incompatibility present 26 Tree vigor strong Application variety: Similar variety: Tamnaneunbong Shiranui NO Characteristics No Data No Data 1 Plant: Type 1 5 2 Young shoot: 5 2.6 mm 1 1.9 mm thickness 3 Young shoot: length 7 20.0 cm 7 15.9 cm 4 Stem: internode 5 1.9 cm 5 1.5 cm length 5 leaf: color 5 5 6 leaf: length 7 10.1 cm 5 8.0 cm 7 leaf: width 5 4.3 cm 3 3.2 cm 8 leaf: length/width 7 2.4 7 2.5 ratio 9 leaf: thickness 5 0.032 mm 5 0.031 mm 10 Leaf petiole: length 3 3.6 mm 5 4.1 mm 11 Leaf petiole: 5 1.9 mm 5 1.7 mm thickness 12 Flower: petal length 5 16.3 mm 5 15.0 mm 13 Flower: petal width 7 8.1 mm 7 6.7 mm 14 Ovary: shape 6 3 15 Flower: activity 1 1 pollen 16 Fruit: length/width 3 0.95 3 0.95 ratio 17 Fruit: surface color 4 4 18 Fruit: surface 9 9 roughness 19 Fruit: fresh color 5 5 20 Fruit: skin thickness 5 3.7 mm 5 3.9 mm 21 Fruit juice: total 5 17.5°Bx 5 16.0°Bx soluble solids 22 Fruit juice: acidity 7 1.51% 5 1.22% 23 Mature stage 7 7 24 Parthenocarpy 9 9 25 Self-incompatibility 9 9 26 Tree vigor 9 5 30

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying colored photographs illustrate the overall appearance and distinct characteristics of the new Citrus reticulata Blanco ‘Tamnaneunbong’ showing colors as true as is reasonably possible with colored reproduction of this type. These photos were taken in 2010 in Korea. Colors in the photographs may differ slightly from the color values cited in the detailed botanical description which accurately describes the color of the ‘Tamnaneunbong’.

FIG. 1 provides multiple views of the ovaries of the fruits harvested from ‘Tamnaneunbong’ and ‘Shiranui’. The four ovaries on the left of the photograph are ovaries of the fruit harvested from ‘Shiranui’ while the four ovaries on the right of the photograph are ovaries of the fruit harvested from ‘Tamnaneunbong’. All are from ten years old plants.

FIG. 2 provides multiple views of typical fruits harvested from ten years old ‘Tamnaneunbong’ plants. Top, bottom and side views of the whole, unpeeled fruit is shown as well as two cross-sectional views of the inside of the fruit.

FIG. 3 provides multiple views of typical fruits harvested from ten years old ‘Shiranui’ plants. Top, bottom and side views of the whole, unpeeled fruit is shown as well as two cross-sectional views of the inside of the fruit

FIG. 4 illustrates in full color typical foliage and fruits of ‘Tamnaneunbong’ on the ten years old tree.

FIG. 5 illustrates in full color typical foliage and fruits of ‘Shiranui’ on the ten years old tree.

DETAILED BOTANICAL DESCRIPTION

In the following description of the new cultivar ‘Tamnaneunbong’ as taken from tests carried from 2007 to 2010. The characteristics of the overall ‘Tamnaneunbong’ plant include strong tree vigor, erect-type tree form, fruit shape which is oblate, orange pericarp color, orange flesh color, strong fragrance and moderate oil glands. The following observations and measurements describe ‘Tamnaneunbong’ plants grown in Korea.

The Colour Chart used in the identification of colors described herein is The R.H.S. Colour Chart of The Royal Horticultural Society, 2007, Fifth edition, except where general color terms of ordinary significance are used.

TABLE 5 Color of ‘Tamnaneunbong’ and ‘Shiranui’ Tamnaneunbong Shiranui COLOR COLOR Fruit: surface Yellow Yellow orange Yellow Yellow orange color orange RHS 25A orange RHS 25A Fruit: flesh color Light RHS orange Light RHS orange orange 26B orange 26B leaf: upper Green RHS green Green RHS green surface color of 137A 137A mature leaves leaf: lower Green RHS green Green RHS green surface color of 137A 137A mature leaves Leaf: upper Green RHS green surface color of 143A young leaves Leaf: lower Green RHS 144A surface color of young leaves Stem: bark color Greyed- RHS Greyed- Green Green 197A Flower: color of White RHS NN 155 opened flower White C Petal: upper White RHS NN 155 surface color White C Petal: lower White RHS NN 155 surface color White C Seed: seed color No Seed

-   Propagation: ‘Tamnaneunbong’ is typically grafted onto rootstock of     ‘Shiranui’. -   Plant:     -   -   Age of plant described.—Approximately 3 years old.         -   Vigor.—Strong.         -   Plant posture.—Upright. -   Foliage:     -   -   Young shoot thickness.—2.6 mm.         -   Young shoot length.—20.0 cm.         -   Stem internode length.—1.9 cm.         -   Leaf color.—Green.         -   Leaf length.—10.1 cm.         -   Leaf width.—4.3 cm.         -   Leaf length/width ratio.—2.4.         -   Leaf thickness.—0.032 mm.         -   Leaf petiole length.—3.6 mm.         -   Leaf petiole thickness.—1.9 mm.         -   Leaf arrangement.—Alternate.         -   Venation pattern.—Pinnate.         -   Leaf margins.—Crenate.         -   Texture of the leaf.—Smooth.         -   Length and color of stipules.—Absent of stipules. -   Flower:     -   -   Flower petal length.—16.3 mm.         -   Flower petal width.—8.1 mm.         -   Ovary shape.—Short oval.         -   Flower.—Pollen absent.         -   Flower diameter.—About 2.3 cm to about 2.6 cm when fully             opened.         -   Petal length.—About 1.58 cm to about 1.85 cm.         -   Petal width.—About 0.76 cm to about 0.95 cm.         -   Petal texture.—Smooth.         -   Petal margin.—Smooth.         -   Petal color upper and lower surfaces.—RHS NN 155 White C.         -   Flower bud color.—RHS NN 155 White C.         -   Flower bud shape.—Oval.         -   Flower bud size.—Medium.         -   Flower fragrance.—Present.         -   Average number of flowers per panicle.—About 5.         -   Ovary shape.—Short oval.         -   Style length.—About 14.5 mm to about 17.5 mm.         -   Stamen number.—About 15 to about 21, with complete style             development.         -   Stamen length.—About 9.5 mm to about 14.5 mm.         -   Anther color.—White (RHS White NN155A).         -   Pollinator.—Not required.         -   Parthenocarpy trait.—Present.         -   Pedicle length.—1.1 cm.         -   Pedicle color.—RHS Yellow-Green Group 144M. In Jeju-do,             Korea, the time for the first bloom is approximately March             15th, the end of bloom is approximately April 25th. -   Fruit:     -   -   Fruit shape index.—89 to 95.         -   Fruit length/width ratio.—0.95.         -   Fruit weight.—237 g to 365 g.         -   Fruit surface color.—Medium yellow.         -   Fruit surface roughness.—Rough.         -   Fruit fresh color.—Light orange.         -   Fruit flesh rate.—72.6% to 77.7%.         -   Fruit skin thickness.—3.7 mm.         -   Fruit juice total soluble solids.—17.5° Bx.         -   Fruit juice acidity.—1.51%.         -   Seed grain number.—0.         -   Mature stage.—Late.         -   Parthenocarpy.—Present.         -   Self-incompatibility.—Present.         -   Productivity of fruit.—About 2500 kg/10 acre to about 3000             kg/10 acre.         -   Market use of the fruit of the observed plant.—Fresh fruit.         -   Other fruit features.—‘Tamnaneunbong’ is intermediate             resistant to citrus scab disease and citrus canker, but             susceptible to melanose. For the very early mature stage,             ‘Tamnaneunbong’ should be protected when cultured. Since the             fruit would be matured in the cold season, the cold season             may reduce the quality of the fruit if the fruit is planted             in an open field. Therefore, ‘Tamnaneunbong’ needs to be             planted under a protected environment. Pruning on             ‘Tamnaneunbong’ is the same as ‘Shiranui’. Fruit and plant             are damaged when the temperature is below −7° C.

TABLE 5 A descriptive comparison between ‘Tamnaneunbong’ and another known Citrus reticulate cultivar ‘Setoka’(not patented). Variety Harvest Shape Sugar degree Acidity/ Fruit Denomination time Index (″BX) % weight/g Setoka Early-Late 129.6 13 1.0 200 February Tamnaneunbong Late March 92.8 15.2 1.51 274.5

TABLE 6 The characteristic and observed dates of first and last pick in the specified location of culture as observed in Jeju-do, Korea. Peak Variety Fruit Flesh Shape height/ Time Denomination weight/g rate/% Index mm 7.1.24 Tamnaneunbong 268.4 77.5 94 15.6 8.2.14 Tamnaneunbong 254.8 75.7 89 12.8 9.2.17 Tamnaneunbong 364.8 72.6 93 17.0 10.2.24 Tamnaneunbong 240.3 — — — 10.3.4 Tamnaneunbong 237.7 76.5 93 — Pericarp Sugar Acid- thickness/ Seed degree Acidity/ sugar Time mm number (″BX) % ratio 7.1.24 2.9 0 14.4 1.28 11.24 8.2.14 3.7 0 13.6 1.44 9.43 9.2.17 4.2 0 15.3 1.28 11.97 10.2.24 — 0 15.3 1.46 10.47 10.3.4 3.8 0 17.5 1.51 11.74

Regarding the observed plant's drought/heat tolerance, although the variety has not been tested for drought and heat resistance, it can grow at a temperature of about 40° C. and without irrigation for about 45 days. Such conditions do not have much effect on the growth of the variety. 

What is claimed is:
 1. A new and distinct cultivar of Citrus reticulate Blanco plant named ‘Tamnaneunbong’ as herein illustrated and described. 